Reuse of Waste Plastic in the Modification of Rheological Characteristics of Bitumen (original) (raw)
Related papers
The Study of Rheological Properties of Bitumen Blends Modified with Dissolved Plastic Water Sachet
2020
Rutting, which is permanent deformation or consolidation of asphalt pavement, is one of the flexible pavement failures. Research has shown that one of the ways of resisting this failure is by modifying the rheological properties of bitumen. This modification can be achieved by the addition of dissolved plastic water sachet (DPWS), a well-known waste in Nigeria, to bitumen. This study was conducted to investigate the effect of DPWS on the rheological properties of bitumen and at the same time reduce the environmental hazard associated with PWS disposal with consequential pavement material improvement. Bituminous blends containing DPWS at various percentages 0, 1, 3, 5, 7, 9, 11, 13, 15 and 17% by weight of conventional bitumen were used for the study. Tests on rheological properties such as dynamic viscosity, phase angle, peak shear stress and peak shear strain were carried out on unmodified and DPWS modified hot and warm bitumen blends to determine the corresponding complex shear mo...
Thermo-rheological behavior of modified bitumens adding virgin and waste polymers
The use of recycled polymers for replacing virgin polymers has been employed in the road building contributing to asphalt performance and lower environmental pollution. In this work the copolymers ethylene vinyl acetate (EVA) and a recycled EVA copolymer from industry (EVAR) were used as modifying agents of the Brazilian bitumen. Other additive as a cashew nut shell liquid (CNSL) was also added in order to evaluate its use as bitumen modifiers. The rheological properties of the modified binders were analyzed by means of dynamic shear rheometer (DSR) and accelerated ageing experiment (RTFOT). Differently to the original the modified binders showed non-Newtonian behavior. The results obtained reveal that EVAR can be considered as an interesting substitute of EVA not only as a mean of effecting improvement but also from an economic and environmental point of view. The use of the original EVA and EVAR waste polymers helped to improve the aging resistance. The rutting factor (G*/sin δ) suggest that the polymers and waste can improve the elasticity of the asphalt. The activation energy of the viscous flux (Ef) for the samples oscillated between 58 and 70 KJ/mo land showed that the additive CNSL can reduce the viscosity and thermal susceptibility of the modified binder.
Upgrading of Rheological Properties of Bitumen with Waste Plastic
Civil Engineering and Architecture
Usually plastics are disposed in land filling and are burnt in free atmosphere which are detrimental to health. Land filling may affect water recharge, diminishing soil microbial activity, water line and drainage clogging. If waste plastic reaches to its ignition temperature, it evolves nontoxic gases which can cause abnormality in human beings. Thus its disposal is really a hard problem due to its non-biodegradability and unaesthetic view. Eventually Engineers have come across the point to use waste plastic as a binder material in its melt condition. This method has helped us a safe disposal of plastics junk, with operative rheological properties in the construction of pavement. Plastic bottles, packing containers and shopping bags production is increasing gradually, these results in the increase of waste plastic. Low Density Polyethylene (LDPE) with different percentage by weight of bitumen was mixed with 60/70 grade bitumen. Standard Tests on bitumen were conducted for this purpose i.e. Penetration Test, Flash Point and fire point Test, Softening Point and Binder Density. Low Density Polyethylene (LDPE) was mixed with bitumen that showed better result for the tests.
Fuel, 2003
Mixing polymers into bitumen has important consequences on the engineering properties of bituminous binders. Thus, structural and chemical changes may be observed during processing of polymer-modified bitumens. Chemical compatibility and processing conditions are crucial to obtain suitable properties. Most polymers occur to be insoluble, in some degree, in the bitumen matrix, and phase separation may result. Polymer stabilization can be
Rheological evaluation of ethylene vinyl acetate polymer modified bitumens
Construction and Building Materials, 2002
The morphological, thermal and fundamental rheological characteristics of ethylene vinyl acetate (EVA) copolymer modified bitumens are studied in this paper. Nine plastomeric EVA polymer modified bitumens (PMBs) have been produced by laboratory mixing bitumen from three sources with an EVA copolymer at three polymer contents. The morphology, thermal properties and rheological characteristics of the EVA PMBs have been analysed using fluorescent microscopy, differential scanning calorometry and dynamic mechanical analysis using a dynamic shear rheometer, respectively. The results of the investigation indicate that EVA polymer modification increases binder stiffness and elasticity at high service temperatures and low loading frequencies with the degree of modification being a function of bitumen source, bitumen-polymer compatibility and polymer concentration. Filler type modification is evident at low temperatures, temperatures above the melting temperature of the semi-crystalline EVA copolymer and for those modified binders that do not exhibit a dominant polymer network. ᮊ
Rheological properties and stability of ethylene vinyl acetate polymer‐modified bitumen
Polymer Engineering & Science, 2013
Polymers are commonly used to improve the properties of bitumen (BIT) as a binder for asphalt. Polymers improve the temperature susceptibility of BIT by increasing its stiffness at high service temperatures and by reducing its stiffness at low service temperatures. The addition of polymers as BIT modifiers contributes to the BIT viscoelasticity. The aim of this article was to study the effect of the addition of ethylene vinyl acetate (EVA) copolymer on the morphology, rheological, and physical properties before and after aging. The influence of EVA contents on rheological and physical properties which are included in conventional tests before and after aging was investigated. The results indicated that the rheological and physical properties as well as the morphology of polymer‐modified bitumen (PMB) depended on the polymer content. The rheological properties of road BIT were improved by means of EVA polymer modification as proven by conventional tests, the rheological parameters G*...
Influence of thermal history on rheological properties of various bitumen
Rheologica Acta, 2006
The mechanical properties of bituminous binders play an important role in the performance of the corresponding asphalt mix, and a lot of failure mechanisms in asphalt roads are believed to relate to a rheologcal aspect of the corresponding bituminous binder. In 1994, the strategic highway research program was the first to propose performance related specifications, which were based on rheological properties of the binders, taking into account the climatic and loading conditions of the pavement. Also, in the future European specifications, a lot of the tests will be based on rheological properties.